Spawn a BP?

It works ! Cheers ! ^^

About impact : Saving instructions is always a good thing, but as you say, for a small project, few instructions will not have impact like, for example, a massive tick event applied to a thousand ai characters. In your case, you may can save a bit by setting your start location as a transform instead of a vector, using “get world location” to a “make transform”, set rotation there and "set your variable (no more vector but transform) . Then you’ll just “get” your ready to use transform on spawn without nothing needed to do in.